Bandwidth Part Determination for IoT Random Access
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Solution Overview
Problem
Current MTC and NB-IoT technologies in LTE systems are inadequate for supporting high-speed and low-latency requirements of IoT services like video surveillance and smart home applications, as they only support rates of a few hundred kbps to a few Mbps, and are unable to efficiently manage BWP configuration after random access in 5G NR systems.
Innovation Solution
A method for determining a first BWP that differs from the second BWP used for random access, allowing the terminal to switch to the first BWP for monitoring after completing random access, which is configured by the network device or based on predefined rules, thereby optimizing bandwidth usage and reducing overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single BWP is used for both random access and subsequent monitoring, then device complexity is reduced, but bandwidth utilization efficiency deteriorates
Solution Approach 1:
The patent divides the BWP configuration into two distinct segments: a first BWP for random access and a second BWP for subsequent monitoring. This segmentation allows each BWP to be optimized for its specific function, improving overall bandwidth utilization efficiency while maintaining manageable complexity through structured configuration.
2Reliability
If the Initial DL BWP includes SSB and other signals, then signal coverage is improved, but BWP overhead increases
Solution Approach 1:
The patent extracts the SSB and other signals from the Initial DL BWP, creating a separate structure where these signals are positioned outside the BWP boundaries. This extraction reduces the overhead within the BWP while maintaining signal coverage through alternative positioning mechanisms.
3Reliability
If TDD center frequency-alignment is considered in BWP design, then synchronization is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by considering TDD center frequency-alignment specifically for the first BWP (random access BWP) rather than uniformly across all BWPs. This targeted approach maintains synchronization reliability where needed while reducing overall device complexity by avoiding unnecessary alignment requirements in other BWPs.
Data Source
AI summary
A bandwidth part (BWP) determination method is applied to a terminal. The BWP determination method includes: determining a first BWP, wherein the first BWP is monitored after the terminal completes a random access; and the first BWP is different from a second BWP, and the second BWP is used when the terminal performs the random access.